X t truck construction



Filed April so, 1927 W. F. J. CASEY ET AL TRJGK CONSTRUCTION oo. 2 9 l 4, 1., ow ...u .A

Aug. 14, 192s. 4 1,681,095 'W. F. J. CASEY ETAL TRUCK CONSTRUCTION -iFiled April 30, 1927 2 Sheets-Sheet 2 FIGB 1 luuk i Y.NW

ATTORNEYS Patented Aug. 14, 1928.

"Nrreo STATES `Parleur OFFICE.

verraient is. a. cnsnvnivn eusfrsvn Gavin, or murieron', curante, Ann cuantas .anco-Ks, or MONTREAL, sonerie, camine.

TRUCK eonsrn'cotrrou.

Application filed April 30, 1927.V Serial No. 187,853.

This invention relates to new and useful improvements in i truck construction and., particularly, to the construction of the leading trucks for locomotives andthe suspension rneans therefor. A y 'lhe object of the invention is to provide a leadingtruck of simple construction which vvill be very easily dismantled for repairs, and in which the journal `bores will be posi tioned on the outside of the travelling Wheels to iacilitateinspection, oiling and re pairing oit the journalv box parts.

Another object is to provide a leading truck in which the riding springs will be arranged to' absorb and.` evenly distribute between the journal boxes, any shocks due to rail joints and the like, thereby reducing the possible chance of spring breakages to aniinirnum. i v i y y A further objectV is to provide a leading truck in which the suspension springs will be protected by the truck framing.

According to our invention, the leading truck traine is built in one piece `With javvs or guides lorrned therein to receive the journal'boxes.` 'lhe journal boxes are mounted to move in the vertical direction ,Within the guides, and are positioned on the outside ot' the travelling' Wheels. Integralcross tying members are formed in the truck at the ende thereof to form` guards for the travelling wheels.` The truck is provided with a series of suspension springs and equalizers, so arranged` that i they evenly distribute between the journal bearings any shocks which may occur during the .travelling oi' the device. The sides oi the truck traine are shaped to receive and partially cover the spring suspension nieans to protect saine.

ln the dravvingswhich illustrate one forni of our invention .Y i i Figure l is a plan vievv of our improved type of leading truck Ylor locomotives.

Figure@ is a side elevation of the truck shown in Figure l. i i Figure 3 is anend elevation of the truck shown partly in section. Figure 4 is an enlarged detail showing the spring suspension means and the equalizer. lligure o is a `plan 'view' ot the device shovvn in Figure 4f. i Referring more particularly to the drawings7 ll designates `the truck lrainevvhich comprises the side sections l2, the central connecting section. 13, and tbeend tying guides.

`between the bearings and between the side sectiona with the journals 22 rotatably mounted 1n the `voui-nal bearings. rlhe end sections connect the side sections and forni guards for the travelling Wheels. A suitable tying nieniber 23 may be formed in the truck traine between the end section l5 and thel centre section ,1.3. The spring support-` ing members 2d are preferably niade integral with the journal bearings and depend troni the underside thereof. AThe springs 25, which are ot 'the se1ni-elliptic type, are provided with a centresaddle 26 which rests on the cross bar 2T oi the member. Q4. Eacliside section is provided viith a central spring 28 oit the semi-elliptic or laminated plate type, with a centre saddle 29 preterably groovcd on its underside to rest on and engage with the pins 8O passing through the ribs J2 and the vertical Webs 3l of the side frames, which are of channel-shaped. cross section at the cent-re, as shown in Figure 3, with the vertically disposed ribs 32 and Se. Bearingplates 35 and 36 are secured to the ends ot the springs `9.5. Grooves 37 are formed in the plates 85 to receive pins or rollers 38. which bear against hardened steel `plates 39 secured to `the underside ol the side sections of the #frame in proximity to the ends thereof. SuspendedY on the pins 38 and embracing the endszol :the springs are the guidese. The guides pass through suitable slots 4l cut in the `plates 35). Pivotally supported on pins l2 positioned midway between the springs and passing through spaced vertical Webs 413 and la or the side sections arethe equal izer beains llo, the outer ends i6 and e7 of which are provided with bearings i8 and a9, respectively. The bearings 48` rest on saddles 50, suspended on the links 5l,iWl1ich are provided with suitable bearing pins 52, which rest in the grooves 53 formed in the bearing plates 36. The links pass vthrough slots formed in the ends VGand in the ends of the springs adjacent thereto. The ends 47 rest on saddles or bearings 54 formed in the lower ends of the links 55 suspended from the ends of the springs 2S by means of the bearing pivot pins 56. The pins 56 rest on grooved end bearing plates 58 litting intore'cesses 57 formed in the ends oi the springs 28. The springs 25 are positionedv directly below the journals and the springs 28am partially enclosed by the side sections,

so thatthe springs-are protected to a certain citent.v The equalizerl beams are also protected by being positioned between the vertically disposed Websy oi the side members, or sections of the frame. The ends of the equalizer beams are biiiurcated and the ends oi the lsprings adjacent thereto are slotted to allow the suspension links to 'pass there through, andy also, to forma means for holding theV links in place.

Modifications may be made in the construction o the truck frames and the manner of mounting the suspension links, Withing conditions.

out ydeparting from the spirit of the invention.

In Aoperation the load of the front end of the `locomotive is transferred to the truck frame, through the centre bearing, and the truck frame being of integral construction, `transmits the load evenly to the journal boxes through the springs and The points of application ofthe load is through the pins supporting the equalizer beams and the bearing plates in proximity tothe ends of the fra-mes. The 'outside springs, or the springs beneath vthe journal boxes, take up the main-part of the load, While the centre springs act as a balancing means' to evenly distribute between the bearings any-shocks or j olts which may takje place during the operation of the bogie. rlhis arrangement of spring suspension isV very flexible,v and tends to reduce spring breakages to a minimum.

It Will'be seen that the springs are partially covered and protected. by the truck iframe.y The bearings are placed on the outside of the travelling Wheels, so that easy access is' obtained `to the journall boX bearings vfor inspection, oiling and repairs.

vThe frame being-made in one casting, tends to reduce the-initial` cost of thel frame and also the'maintenance of same under Work- 'llhe frame is properly braced to prevent breakages therein and the end bracing members, or sections, guard the Wheels. VThe `device is very easily assembled. f.

Having thus described our invention, what Weel-aim isgy l. In a locomotive truck, a truck frame,

journal bearings slidably mounted in the frame, axles rotatably mounted in the bearings, travelling wheels attached to the axles between the bearings, springs beneath the bearings, one end of each oi' the spring gaging with the frame, equalizer beams pivotally secured to the frame, each being attached at one end to the free end of the bearing spring, shock absorbing springs mounted on the trame between adjacent ends oi' the equalizer-beams, and means connecting the adjacent ends of the beams to the ends of the equalizer springs.

2. ln truck construction, a frame, journal bearingsf slidably mounted in the frame, semi-'elliptic springs positioned beneath each bearing and engaging at one end with the frame and at-the centre with the bearing, equalizer beams pivotally mounted in the frame, means connecting the free ends of the springs with the equalizer beams, semi elliptic equalizer springs between the ad,- jacent endsoirthe equalizer beams and resting on the frame, and means pivotally connecting the adjacent ends of the equalizer beams and the equalizer springs.`

3. ln truck construction, a frame, journal bearings slidably mounted in the frame, semi-elliptic springs engaging with and posi tioned below the bearings and havingone end of each engaging with the iframe, equalizer beams vpivotally secured to the frame, and having] one end of each pivotally suspended on links depending from the bearing springs, equalizeispiings supported in the centre ofthe frame, and having depending links engaging-'With 4adjacent ends ol the equalizer beams.-

Ll. In truckconstruction, a frame, journal bearings slidably mounted in the frame, said bearings having supports depending there from, Semielliptic springs resting on said supports and having one end engaging with the' frame', equalizer beams pivotally secured to the frame andl each pivotally secured at one end to `the end` of the bearing spring ad-y jacent-thereto, equalizer semi-elliptic laminated springs supported at the centre of the rameand lhaving their ends pivotally connected to the ends of the equalizer beam adjacent thereto.

5. In truck construction, a frame, journal boxes slidably mounted in the frame, supports depending from the underside of the bearings, semi-el-liptic springs for each bearing and having their saddles resting on the supports, one end of each of said springs being provided with agrooved plate adapted to receive a roller Whiehengages with a plate secured to the frame, equalizer beams pivotally securedto the frame, one end of each of theequalizer beams bein@ pivotally attached to the free end of the ilaearing spring adjacent thereto, equalizer springs of the wsemielliptic type having their saddles resting on es en- Y journal bearings slidably mounted on the `iframe and having supports depending therefrom, senire'lliptc springs resting on said supports and having one end of each spring engaging with the truck frame, equalizer beams pivotally mounted in the frame, one end of each of the beams being pivotally secured to the end of the bearing spring adjacent thereto, equalizer springs resting on pins passing through the frame and having their ends pivotally secured to the ends of lthe equalizer beams attached thereto, said -iframe being channel-shaped at the centre to partially enclose the equalizer springs.

7. .ln truck construction, a one-piece :traine comprising side sections, a centre section and end tying sections, `journal boX bearings slidably mounted in guides formed near the ends of the side sections, axles rotatably mounted in the journal bearings and having travelling Wheels secured thereto between the bearings, senii-elliptic springs mounted in supports depending :troni the bearings, said springs each having one end engaging with the underside of the frame, equalizer beams pivotally secured to the frame and having one end of each of the beanis pivotally secured to the free end of the bearing springs,

equalizer semi-elliptic springs resting on pins passing through the side sections, and means pivotally connecting the ends of the equalizer springs to the ends of the equalizer beams adjacent thereto, said side sections being of channel form at the centre to partially enclose the equalizer springs and said end tying sections of the frame acting as guards lfor the travelling Wheels.

In Witness whereof, We have hereunto set our hands.

WILLIAM F. J CASEY. GUSTAVE GAVIN. CHARLES E. BROOKS. 

